NROL-35 is a top-secret satellite-delivery flight for the U.S. National Reconnaissance Office. The NRO is the secretive government agency that controls the country's spy satellites. The identity and purpose of the payload launched Friday were not released to the public. But speculation centered on a new generation of electronic signals intelligence-gathering satellite, commonly referred to as Trumpet, and that flies in a Molniya-style orbit of 700 by 23,300 miles (1,127 by 37,498 km).